How to pass payload using Get method-Mule4

ByManish Kumar

Dec 22, 2020

Hello Friends,

I recently worked for one of API implementation where I needed to encrypt and send/receive one or more field in queryParms/headers while calling Get operation to external system.

As per API standard Get method should not pass payload as body while calling any Apis or 3rd party systems. Get method supports Uri Params, Query Params or Header Attributes.

In this article, I will show you the technique how you can pass encrypted payload using Http Get method. This is one of tricky interview question which normally asked in Mulesoft or Api Design related interviews.

As we know the when we encrypt any value it will not be a single string. Encrypted value may be of be multiple line as given below for PGP encryption for value 123456

—–BEGIN PGP MESSAGE—–

Version: BCPG v1.58

hIwDmCS94uDDx9kBA/9NIO0Kq9+yhXBLQveoykVjbECqXnGM8DargSsBxE2xBLQP

000W7mre5YpeSRJi4dvjVkAKPaxIFJhHlUNv38i5DkGD/z53SKtbKfYdfT+3oHT4

SVnIkcqWM+i+xawrKSk8Lz+j5GaJZ+wQrrxi8TP9RVW+wZlcbBNfxZVShDYp8dJX

AX9/x+1dFyO0EtHBipB0MLOqrb+sua028HGcg7E/sptn89JAgUcNEXOurVSfN6Ws

P/KxUMQY9+KKQQKavJ6LC92a6GJhVk4S+cnY1sxDLGtqKcGd+qCd

u003dwGi2

—–END PGP MESSAGE—–

For both scenario(send/receive) we will be using (dw::core::Binaries) module from dataweave

toBase64(Binary): String

It takes Binary as input and returns result as base64 encoded String.

base64 Encoding

fromBase64(String): Binary

It takes base64 encoded String and returns original Binary data as a result.

base64 decoding

In this article we have seen how to convert encrypted payload to base64 encoded string and vice-versa. We can do the same conversion and pass with other payload type like JSON/XML etc..
These two dataweave functions are quite useful while dealing with payload with GET method.

Happy Learning 🙂

By Manish Kumar

I am having around 10 years of IT experience in Integration Architecture, Requirement gathering, Effort Estimation, Application Design\Development\Testing and Deployment including 5+ years of experience in MuleSoft ESB and Hybrid Integrations. DevOps and Cloud Integration is my area of interest.

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